What is bquote in terminal?

That's a rather common point of confusion. 'bquote' isn't a command itself, but rather refers to the backquote character (), which is often found on the same key as the tilde (~).

Essentially, it’s a mechanism known as command substitution. The shell executes whatever is inside the backquotes first. Then, it replaces the entire backquoted expression with the command's output.

For instance, if you type echo "Today's date isdate", the shell first runs the date command. It then substitutes the output of date directly into your echo command before running it.

It's worth noting that this syntax is a bit old-fashioned. Modern practice strongly favours using $(...) instead, as in echo "Today's date is $(date)". This newer form is much clearer to read and, crucially, nests far more easily. In essence, it’s a way to use the result of one command within another.